Lately, the cold idle has been lower and lower when car is first started. Only about 1200 RPM, and drops to 900 or so within the first minute of idling - temp gauge hasn't even budged at this point. Car has very low miles - only 20K - although mostly once a week highway trips. Any ideas? I see there was TSB in March '03 on idle speed measurement - anyone know of a connection? Thanks!